*{
    margin: 0;
    padding: 0;
}
header,main,footer{
    width: 1000px;
}
header{
    height: 100px;
    margin: 0 auto;
    background-color: #777777;
}

main{
    height: 570px;
    margin: 10px auto;
    background-color: #e8e7e3;
}
nav,article,aside{
    height: 570px;
    float: left;
}
nav{
    width: 200px;
    height: 570px;
    background-color: aqua;
}
article{
    width: 580px;
    height: 570px;
    background-color: aquamarine;
    margin: 0 10px;
}
#top{
    width: 580px;
    height: 350px;
    background-color: #777777;
}
#left,#mid,#right{
    float: left;
}
#left{
    width: 190px;
    height: 200px;
    margin: 10px 0;
    background-color: brown;
}
#mid{
    width: 190px;
    height: 200px;
    margin: 10px 5px;
    background-color: beige;
}
#right{
    width: 190px;
    height: 200px;
    margin: 10px 0;
    background-color: black;
}

aside{
    width: 200px;
    height: 570px;
    background-color: aqua;
}



footer{
    height: 150px;
    margin: 0 auto;
    background-color: #3f3f3f;
}
